The Gunners boss was speaking following his side's snatch and grab draw at Old Trafford.

Despite the Red Devils dominating the game and taking the lead through Juan Mata, an 89th minute Olivier Giroud header rescued a point for the north Londoners.

Jose Mourinho's side had five shots on target compared to Arsenal's one, and Wenger claimed that his side put in a "Serious defensive performance".

Olivier Giroud scores (Image: Reuters)

The Frenchman did confess to his side lacking in attack.

Asked why he thought his side didn't produce the kind of display they've managed in recent weeks, Wenger said it may have been a mixture of the international break and United's strong defensive performance.

Antonio Valencia goes down in the area after a challenge by Nacho Monreal (Image: Reuters)

In the first half, the Red Devils had a strong case for a penalty when Nacho Monreal brought down Antonio Valencia. But Wenger believed it was not a foul.

Olivier Giroud came off the bench to grab the equaliser, and Wenger insisted that he considers the striker as a regular player.

He believes he has two options, with one being Sanchez playing out on the wing.